Mashing apparatus



UNITED STATES PATENT OrricEi OTTO SELG, OF BROOKLYN, NEW' YORK.

MASHING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 598,120, dated February1, 1898.

Application filed nmhzt, 1895.

To all whom it may concern:

Be it known that I, OTTO SELG, of Brooklyn New York, have invented anImproved Mashing Apparatus, of which the following is a specification.

This invention relates to an improved mashin g apparatus used in brewingbeer and other malted beverages.

The invention consists in the combination of the mash-tub with theair-pipe, water-pipe, steam-pipe, and. thin -mash pipe more fullypointed out in the claim.

In the accompanying drawings, Figure l is a vertical section of myimproved mashing apparatus. Fig. 2 is a horizontal section on line 2 2,Fig. 1, with the false bottom omitted.

The letter A represents the mash-tub provided with the stirrers a,whichare revolved as usual.

0/ is the feed-opening or manhole, upon which isadapted to fit an elbowa through which the hot air may be exhausted.

b is a pump for drawing the cloudy wort from the bottom of the mash-tubA through pipe I) and filling it in at the top of the tub through pipe17 a c is a circular pipe which is located beneath the tub A andconnects with the tub by three (more orless) uprightbranches c and onehorizontal branch 0 Through the pipe 0 cold air, water, or steam may beintroduced into the tub. The cold air passes from an airpump (not shown)through pipe d and thence to the top of the tub through branch cl and tothe bottom of the tub through branch (Z connection 0 and tube 0. Thewater flows from a tank (not shown) to the bottom of the tub throughpipe 6, branch 0 and pipe 0.

The steam passes from a boiler (not shown) through pipe f, branch 0 andtube 0 to the bottom of the tub. It may also be admitted to the top ofthe tub by a pipe f, which is fed from the pipe 0.

g is a sparger for injecting hot or cold water into the apparatus.

The bottom It of the tub A, I make of bulged or concave form incontradistinction to the straight form heretofore generally used and theupper perforated false bottom h is made of a corresponding bulged orconcave form. This feature of construction I deem of great importance,because it concentrates the grain Serial No. 543,023; on; model) andcauses it to form a closely-packed body. Thus the grain will beprevented from drawing canals or splitting, and therefore the watercannot escape through it without completely Washing out the extract. Thefalse bottom 72 has a central opening controlled by a sliding gate kwhile the solid bottom h has a corresponding central opening controlledby gate valve h Through this opening the spent grain is discharged bymeans of a pipe 7L3. This pipe also connects with a tube 2', leading tothe beer-kettle, and with a pipe 1', leading to the surface cooler.

The operation of the apparatus is as follows: I introduce into the tub Athe necessary quantity of lukewarm water and the malted grain andsubject the mixture to the action of the stirrers a. After a thoroughmixture is effected the stirrers are arrested, and subsequently the thinmash is drawn oif by pump b through pipes Z1 Z7 and branch j. The thinmash runs through the false bottom and through the central opening ofthe solid bottom into pipe Z), which enters at a point between thegate-valve and the central opening of the solid bottom. pump Z7 deliversthe thin mash through pipes b j into a suitable receptacle. I now add afurther quantity of water and the unmalted cerealssuch as corn, rice,&c.the stirrers a being of course again set into rotation. Steam is nowintroduced through pipe c to raise the temperature of the mash to theboiling-point. During this operation the vent Z has been opened, andafter the boiling has proceeded for a short time the vent is closed. Theboiling may be carried on with more or less steampressure, according tothe coarseness or fineness of the raw grain used. After the boiling hascontinued for the proper length of time the pressure is taken off byopening valve Z, the cover is taken 0d the manhole a, and the elbow a isfitted upon the flange of the latter. The vapor is drawn out throughsaid elbow by a suction-blower (not shown) and simultaneously cold airis pumped into the top and bottom of the tub to reduce the temperatureof the mash without the use of water. I now introduce the thin mash atthe bottom of the tub through a pipe m, that leads from the thin-mashtub and connects with the pipe 0. The apparatus is now set From thispipe the at rest for about three-quarters of anhour and all the Valvesclosed, so that the grain Will settle. The pump 1) is then set intoaction to draw the cloudy wort from the bottom of the tub and fill it inat the top, as usual. After the Wort runs clear the pump is arrested andthe wort is run into the beer-kettle through pipe 2'. the sparger isturned on and the second Wort is run off, the sparging being continueduntil all the extract has been washed out of the grain, after which thelatter is discharged through the outlet ha.

The advantages connected with my invention are that the grain iscompacted by the concave form of the bottom, so that thewater iscompelled to percolatethrough the bodyof thegrain and, to draw all theextract out of the latter. boiling the malted and raw cereals thequality of the Wort is. greatly improved and the yield increased becausethe starch is more thoroughly dissolved and converted into dextrine andmaltose. Moreover, the process is greatly simplified, asa singleapparatus will perform the work which it heretofore required hen thefirst worthas been run off,

By simultaneously mashing and;

A mash-tub. provided with a perforated false bottom, an'. annular pipe0, a cold-air pipe, a water-pipe, a steam-pipe and a thinmash pipeentering the annular pipe, and branches that connect the annularpipewith the bottom of the tub, substantially as described.

' Signed at New York, in the county of New York and State of New York,this 22d day of March, A. D. 1895.

oTTo SELG.

W'itnesses:

F. v. BRIESEN, WILLIAM Bottom.

